I'm a 2nd year Dental Student and this was the first time I had ever heard of "Madajet." Perhaps that is an indication of its frequency of use. Personally, Malumed (Handbook of Local Anesthesia, 5th Edition) says that Madajet does not provide adequate anesthesia for pulpal procedures or regional blocks...basically it sounds like a $600 replacement for topical. If I still have to use a "big scary needle" anyway, why wouldn't I just opt for the delicious cherry flavored topical and save my patients a few bucks?
Sorry, I had never heard of Carl Zeiss lenses in loupes before...I guess you must be more picky than me. My orascoptic loupes cost about $700 through the school. I think they will charge you more like a grand if you go it alone.